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Elena L [17]
3 years ago
9

Please help

Chemistry
2 answers:
trapecia [35]3 years ago
7 0

Answer:

can i have the question please

Hitman42 [59]3 years ago
6 0

help with what? I can't see any questions. sorry

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Determine how many moles are present in 0.23kg of SO(2)
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3.59 moles

Explanation:

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How are energy and work related? A. Energy is the force needed to do work B. Work times energy is force C. Energy is the capacit
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he heat of fusion of tetrahydrofuran is . Calculate the change in entropy when of tetrahydrofuran melts at . Be sure your answer
lana [24]

Answer:

\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}

Explanation:

Hello.

In this case, given the heat of fusion of THF to be 8.5 kJ/mol and freezing at -108.5 °C, for the required mass of 5.9 g, we can compute the entropy as:

\Delta S=\frac{n*\Delta H}{T}

Whereas n accounts for the moles which are computed below:

n=5.9g*\frac{1mol}{72g} =0.082mol

Thus, the entropy turns out:

\Delta S=\frac{0.0819mol*8.5 kJ/mol}{(-108.5+273.15)K}\\\\\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}

Best regards.

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3 years ago
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